I wrote a post for the Toptal.com blog. The article covers the WordPress REST API, as well as provides an introduction to REST APIs in general. I offer an example use case that you can follow along, and discuss some future potential of the project. Consider it a birds-eye overview, meant for people like myself who are not API gurus, but WordPress developers interested in expanding their repertoire of development tricks.
Writing for the Toptal blog was a great experience, as they have a killer editorial staff and give a lot of thought to areas like the article design. They’ve been pumping out high quality content around design, development, and business for a while now, so I heartily recommend browsing through everything they have going on over there.